Link Following Affecting snapd package, versions <2.63+20.04ubuntu0.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-UBUNTU2004-SNAPD-7569024
  • published26 Jul 2024
  • disclosed25 Jul 2024

Introduced: 25 Jul 2024

CVE-2024-29069  (opens in a new tab)
CWE-59  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 snapd to version 2.63+20.04ubuntu0.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream snapd package and not the snapd package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

In snapd versions prior to 2.62, snapd failed to properly check the destination of symbolic links when extracting a snap. The snap format is a squashfs file-system image and so can contain symbolic links and other file types. Various file entries within the snap squashfs image (such as icons and desktop files etc) are directly read by snapd when it is extracted. An attacker who could convince a user to install a malicious snap which contained symbolic links at these paths could then cause snapd to write out the contents of the symbolic link destination into a world-readable directory. This in-turn could allow an unprivileged user to gain access to privileged information.

CVSS Scores

version 3.1